The present invention relates to an antenna unit (101) capable of operating in a satellite communication mode. The antenna unit (101) comprises interleaved circular patches for transmitting (102) and receiving (103) radio signals periodical arranged in a first and a second layer. The patches for transmitting (102) in the first layer are arranged in a first lattice (104) and the patches for receiving (103) in the second layer are arranged in a second lattice (105). The first lattice (104) is interleaved with the second lattice (105). Every other patch for transmitting (102) in the first layer has a corresponding patch for receiving (103) in the second layer, where each of the patches for receiving (103) are arranged in such a way that a center axis of the patches for receiving (103) coincide with a center axis of the corresponding patch for transmitting (102).
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1. A multilayer antenna unit having electrically steerable transmit and receive beams comprising:
a first array antenna; a second array antenna; a first layer having a plurality of antenna elements arranged in a first lattice wherein said first lattice forms a portion of said first array antenna, said first layer for transmitting radio signals; a second layer having a plurality of antenna elements arranged in a second lattice wherein said second lattice forms a portion of said second array antenna for receiving radio signals; a third layer of an electrically conductive material forming a ground plane; a first dielectric layer arranged between said first and second layer; a second dielectric layer arranged between said second and third layer; and wherein said first and second array antenna are embedded in said antenna unit in a periodical multi-layer structure where said first lattice is interleaved with said second lattice, and further wherein said transmit and receive beams of said antenna unit have the capability of pointing in substantially equal directions in substantially equal scan volumes.
12. A multilayer antenna unit having electrically steerable transmit and receive beams comprising:
a first array antenna; a second array antenna; a first layer having a plurality of antenna elements arranged in a first lattice wherein said first lattice forms a portion of said first array antenna, said first layer for receiving radio signals; a second layer having a plurality of antenna elements arranged in a second lattice wherein said second lattice forms a portion of said second array antenna, said second layer for transmitting radio signals; a third layer of an electrically conductive material forming a ground plan; a first dielectric layer arranged between said first and second layer; a second dielectric layer arranged between said second and third layer; and wherein said first and second array antenna are embedded in said antenna unit in a periodical multi-layer structure where said first lattice is interleaved with said second lattice, and further wherein said transmit and receive beams of said antenna unit have the capability of pointing in substantially equal directions in substantially equal scan volumes.
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The present invention relates to an antenna unit with a multilayer structure and interleaved antenna elements of similar type for transmitting and receiving radio signals in a satellite communication system.
One type of radio communication is cellular mobile communication where portable radio units communicate with each other or with fixed units through mobile basestations on the ground. Portable radio units, for example mobile phones, which typically transmit and receive signals at a frequency of approximately 900 Megahertz or 1800-1900 Megahertz (MHz), are well known.
Recently it has become important for another type of radio communication, i.e. satellite communication.
In the near future, we will foresee communications by satellites directly to portable radio units. The satellites can reach portable radio units in areas where cellular communication is unavailable due to the lack of necessary cellular towers, base stations or compatible standards. Such satellite communications could allocate to the 2 Gigaherz (GHz) band and the 20/30 GHz bands. Several systems with high data rates (64 kbps and 2 Mbps) are in the planning stage.
The satellites of the systems can be of different types such as GEO (Geostationary Earth Orbit), ICO (Intermediate Circular Orbit), LEO (Low Earth Orbits) or HEO (Highly Elliptical Orbit).
It is recognised that for cellular and satellite mode communication different types of antennas are necessary since cellular antennas usually are linearly polarised and satellite antennas usually are circularly polarised. A further difference is that the satellite communication mode involves a directional component, where link-margin is increased when the satellite antenna on the portable radio unit is pointed toward the satellite, and the cellular communication mode does not usually have such a directional component. Thus, the construction of the satellite antenna is very important.
The U.S. patent with publication No. 5,434,580 describes a multi-frequency radiating array antenna comprising composite elements with a first type of microstrip patch radiating elements and a second type of wire radiating elements. These wire radiating elements are attached to coaxial cables passing through a hole in each of the microstrip patch radiating elements. The object of the patent is to provide an antenna with a single physical surface with two different types of radiating elements on a satellite to save weight and space.
The array antenna comprises additional wire radiating elements placed in a hexagonal or squared lattice around the composite elements.
The JP patent with publication number 8213835 describes an antenna in common use for two frequencies. The antenna comprises a first and a second circular patch antenna. The second patch antenna is concentric arranged above the first patch antenna. Between the antennas a dielectric layer is arranged. Under the first patch antenna is another dielectric layer arranged with a ground conductor and a filter element. The purpose of this antenna is to provide high isolation between the transmitting and the receiving signals without any addition of a large-sized and expansive signal isolation means such as a duplexer.
The JP patent with publication number 7321548 describes a microstrip antenna. The antenna comprises a disk patch antenna, a torus patch antenna and a ground conductor with slots in a layer structure.
The purpose of this antenna is to provide high isolation between the transmitting and the receiving signals.
The US patent with publication U.S. Pat. No. 5,561,434 describes a dual band phased array antenna comprising a first and a second type of antennas. The first type of antenna has mesh antenna elements for lower frequencies. The second type of antenna is an array with patches as antenna elements for higher frequencies arranged in rows and columns. The mesh antenna elements in the first antenna is transparent to the higher frequencies from the patches in the second antenna.
The US patent with publication U.S. Pat. No. 4,903,033 describes a planar dual orthogonal polarisation antenna with a radiating patch on a first dielectric. A ground plane is arranged under the first dielectric with two elongated coupling apertures at right angles to each other. One or two tuning layers with non-aperture tuning elements can be interposed between the first dielectric and the ground plane for the purpose of broadening and tuning the bandwidth of the antenna.
The JP patent with publication number 4-40003 describes a two frequency band array antenna with rectangular patches. The patches operates in a high and a low frequency band and uses two orthogonal polarised waves in common. The patches for the high band are arranged on a dielectric which in turn is arranged on the patches for the low band. Each one of the patches for the low band is arranged under patches for the high band.
As will be seen herein, each of the antennas disclosed in these patents is of a different construction than the satellite antenna of the present invention.
The present invention meets a number of problems related to antenna units.
One problem is the integration of an antenna unit with transmit and receiving means in a radio unit if the antenna unit's area has to be limited to the radio unit's geometrical dimensions.
Another problem is to obtain a high antenna directivity if the antenna unit's area is limited and/or non-planar.
Still another problem occurs if the antenna unit has to search for, track and follow a distant satellite with its transmit and receiving beams. This requires that the transmit and receiving means have steerable beams which are pointing in approximately equal directions.
A further problem is to give the best possible means for an independent selection of transmit and receiving bands of the antenna unit e.g. the number of antenna elements for the transmitting and receiving means and the lattices in which the antenna elements are arranged.
Another problem occurs when radio signals to/from the antenna unit are weak due to low output power or attenuation in the radio wave propagation path. This requires a high radio unit antenna gain with extra link margin.
Yet another problem occurs when the frequencies for transmitting and receiving have to be widely separated. This requires that the number and size of antenna elements for transmitting and receiving have to be flexible.
Still another problem occurs when the transmit or the receiving beam have a higher frequency, where the beam with the higher frequency is submitted to a higher path loss than the other beam. This requires that the transmit and receiving means are arranged within approximately equal geometrical areas.
In light of the foregoing, a primary object of the present invention is to provide an antenna unit capable of operating in a satellite communication mode.
Another object of the present invention is to provide an antenna unit capable of being integrated in a portable radio unit where said antenna is conformal with a radio unit casing.
Yet another object of the present invention is to provide an antenna unit in which the transmitting and receiving means of the antenna shares the same aperture and have substantially equal scan volumes.
A further object of the present invention is to provide an antenna unit with steerable antenna beams for transmitting and receiving pointing in substantially equal directions.
Another object of the present invention is to provide an antenna unit which can switch its antenna beam direction without any mechanical arrangement.
Yet another object of the present invention is to provide a highly directional antenna unit.
A further object of the present invention is to provide an antenna unit which can obtain a high antenna gain within the constraints of a portable radio unit's geometrical dimensions to increase the margin in the link budget.
In accordance with the present invention, an antenna unit with reception and transmitting means is disclosed. The antenna unit comprises two phased array antennas with radiating elements in a multi-layered structure.
More specifically, the antenna unit comprises two interleaved phased array antennas with radiating elements of similar type, e.g. patches or slots, in a periodically variable multi-layered structure. Reception and transmitting beams to/from the arrays are electrically steerable and are pointing in substantially equal directions.
An advantage with the present invention is that the antenna unit can be arranged on a limited and non-planar antenna unit area and still obtain a high antenna directivity.
Other advantages are approximately identical scan volumes for the transmit and receiving means and that the transmit and receiving beams of the antenna unit are pointing in approximately the same direction.
Still another advantage is that the antenna unit can establish a beam sufficiently sharp to select one of several satellites in space which can be viewed from a site of the antenna unit on earth.
More advantages are that the antenna unit has no movable parts which can be broken, the beams of the antenna unit are steerable, highly directional, and they have a high transmit and receive gain.
These above mentioned objects and other features of the present invention will become more readily apparent upon reference to the following description when taken in conjunction with the accompanying drawings.
FIG. 1 is a view of a first embodiment of an antenna unit in accordance with the present invention.
FIG. 2a-c are cross-sectional views of the antenna unit according to FIG. 1.
FIG. 3 is an illustration of a first pattern of patches.
FIG. 4 is an illustration of a second pattern of patches.
FIG. 5 is a view of a part of the pattern according to FIG. 4.
FIG. 6 is a view of a second embodiment of an antenna unit in accordance with the present invention.
FIG. 7a-c are a cross-sectional views of the antenna unit according to FIG. 6.
FIG. 8 is an illustration of a pattern of slots.
FIG. 9 is a cross-sectional view of an antenna unit with beam forming networks.
FIG. 1 illustrates a view of a first embodiment of a circularly polarised antenna unit 101 according to the present invention. The antenna unit 101 comprises a first and a second phased array antenna with circular patches as radiating antenna elements. The phased array antennas 200a, 200b, respectively are illustrated in FIG. 2b-c and are interleaved with each other and embedded in a multi-layer structure within the antenna unit 101.
A phased array antenna in general comprises individual antenna elements of similar type, normally regularly spaced on an antenna surface. Each individual antenna element is connected to beam forming networks in which the inter-element phase shift are set on predetermined values giving the required radiation patterns.
The first phased array antenna 200a comprises patches for transmitting 102 arranged in a first lattice 104. The second phased array antenna 200b comprises patches for receiving 103 arranged in a second lattice 105. FIG. 1 shows an example of a first pattern for the first and second lattice. The patches for receiving 103 are dashed to illustrate that they are in a different layer than the patches for transmitting 102. The first and second lattices are illustrated with dashed-dotted lines 104,105 respectively in FIG. 1.
The patches for transmitting 102 are smaller and are of a larger number than the patches for receiving 103 due to a higher frequency for the transmitted radio signals than the received radio signals. The patches for receiving 103 can as an alternative be used for transmitting and the patches for transmitting 102 can be used for receiving if the received radio signals are of a higher frequency than the transmitted radio signals.
According to FIG. 2a which is a cross-section along line A--A, shown in FIG. 1, the first lattice 104 with patches for transmitting 102 are arranged in a first layer 204 and the second lattice 105 with patches for receiving 103 are arranged in a second layer 205. Between the first and second layer 204, 205 respectively is a first dielectrical volume 201 arranged. A ground plane 203 comprising an electrically conductive material is arranged in a third layer 206. Between the second and third layer 205, 206 respectively is a second dielectrical volume 202 arranged.
Each one of the patches for transmitting 102 in the first layer 204 has a first centre axis C1a which is extending perpendicular through said first, second and third layer 204, 205, 206 respectively. Each of the patches for receiving 103 in the second layer 205 has a second centre axis C2a which is extending perpendicular through said first, second and third layer 204, 205, 206 respectively.
FIG. 2b shows the first phased array antenna 200a a interleaved with the second phased array antenna 200b. Parts of the ground plane 203 in the third layer 206 is dotted to illustrate that those parts do not belong to the first array antenna 200a.
FIG. 2c shows the second phased array antenna 200b interleaved with the first phased array antenna 200a. The patches for transmitting 102 of the first phased array antenna 200a is dotted to illustrate that they are not part of the second array antenna 200b. The ground plane 203 in the third layer 206 and the first dielectrical volume 201 are common for both array antennas 200a, 200b respectively. FIG. 3 shows a part of the first example of the first and second lattice 104,105 respectively forming the first pattern, where four patches for transmitting 302a-d in the first layer 204 are arranged in a square 301. Each of their centre axis's C1a are situated in the corners of the square 301. Patch 302a is a first patch for transmitting diagonal arranged to patch 302d which is a fourth patch for transmitting in the first lattice 104. The square 301 is illustrated in the figure by a dotted line. A distance d1 from one centre axis C1a to another centre axis C1a along a side of the square 301 is determined by the transmitting frequency in a known way to avoid the generation of grating lobes.
A first patch for receiving 303a in the second lattice 105 is arranged in the second layer 205 in such a way that the centre axis C2a of the first patch 303a coincide with the centre axis C1a of the first patch for transmitting 302a, see FIG. 2a. A second patch for receiving 303b in the second lattice 105 is arranged in the second layer 205 in such a way that the centre axis C2a of the second patch 303b coincide with the centre axis C1a of the fourth patch for transmitting 302d.
The patches for transmitting 302a-d and receiving 303a-b define various transmit and receive nodes according to the following:
The first patch for transmitting 302a in the first lattice 104 defines a first transmit node;
The fourth patch for transmitting 302d in the first lattice 104 defines a fourth transmit node;
The first patch for receiving 303a in the second lattice 105 defines a first receive node;
The second patch for receiving 303b in the second lattice 105 defines a second receive node.
The first transmit node of the first lattice 104 in the first layer 204 and the first receive node of the second lattice 105 in the second layer 205 defines a first common node 304a for both of the phased array antennas 200a, 200b respectively in the antenna unit 101.
The fourth transmit node of the first lattice 104 in the first layer 204 and the second receive node of the second lattice 105 in the second layer 205 defines a second common node 304b for both of the phased array antennas 200a,200b respectively in the antenna unit 101.
The patches for transmitting 302a-302d respectively in the first layer 204 functions as driver patches for the first phased array antenna 200a. The patches for receiving 303a and 303b in the second layer 205 functions as driver patches for the second phased array antenna 200b. In the first and second common node 304a, 304b respectively the patches for transmitting 302a, 302d respectively in the first layer 204 functions as parasitic elements for the patches for receiving 303a, 303b respectively in the second layer 205. The ground plane 203 in the third layer 206 functions as a ground plane 203 for both phased array antennas 200a,200b respectively in the antenna unit 101.
The first pattern of the first and second lattice 104,105 respectively according to FIG. 3 is repeated in the whole antenna unit 101 as seen in FIG. 1. This implies that said first and second lattice 104,105 respectively are interleaved with each other in such a way that each one of the patches for receiving 103 in the second lattice 105 forms a common node 106 with every other patch for transmitting 102 in the first lattice 104.
The patches for transmitting 102 in the first layer 204 and the patches for receiving 103 in the second layer 205 are arranged in two interleaved lattices 104,105 respectively which constitute a periodically multilayer structure in the antenna unit 101. (The number of patches varies in a periodical way within the antenna unit 101.)
The interleaved lattices 104,105 respectively in the antenna unit 101 makes it possible to configure the first lattice 104 in a rectangular, triangular, pentagonal or hexagonal pattern to adopt to the differences between the wave length of the first and second phased array antenna 200a,200b respectively.
FIG. 4 shows a second example of a first and a second lattice 404,405 respectively with circular patches as radiating antenna elements 402,403 in the antenna unit 101.
FIG. 5 shows a part of the second example of the first and second lattice 404,405 respectively forming a second pattern. The first lattice 404 in the first layer 204 has six patches for transmitting 502a-f arranged in a uniform hexagon 501 in such a way that each one of their centre axis C1a are situated in the corners of the hexagon 501 (a hexagonal lattice). The hexagon 501 is illustrated in the figure by a dotted line. One centre patch for transmitting 502g is arranged in the middle of the hexagon 501.
A distance d2 from one centre axis C1a to another centre axis C1a along a side of the hexagon 501 is determined by the transmitting frequency in a known way to avoid the generation of grating lobes.
A first patch for receiving 503a in the second lattice 405 is arranged in the second layer 205 in such a way that the centre axis C2a of the first patch 503a coincide with the centre axis C1a of the centre patch for transmitting 502g.
The centre patch for transmitting 502g defines a first transmit node in the first lattice 404. The first patch for receiving 503a defines a first receive node in the second lattice 405.
The first transmit node of the first lattice 404 in the first layer 204 and the first receive node of the second lattice 405 in the second layer 205 defines a common node 504 for both of the phased array antennas 200a,200b respectively in the antenna unit 101.
The patches for transmitting 502a-g respectively in the first layer 204 functions as driver patches for the first phased array antenna 200a. The patch for receiving 503a in the second layer 205 functions as a drive patch for the second phased array antenna 200b. In the common node 504 the patch for transmitting 502g in the first layer 204 functions as parasitic element for the patch for receiving 503a in the second layer 205. The ground plane 203 in the third layer 206 functions as a ground plane 203 for both phased array antennas 200a, 200b respectively in the antenna unit 101.
The second pattern of the first and second lattice 404,405 respectively according to FIG. 5 is repeated in the whole antenna unit 101 in such a way that three adjacent hexagons 501 of patches for transmitting 402 have one patch in common 406, see FIG. 4.
The interleaved lattices 404,405 respectively in the antenna unit 101 makes it possible to configure the first lattice 404 in a rectangular, triangular, pentagonal or hexagonal pattern to adopt to the differences between the wave length of the first and second phased array antenna 200a, 200b respectively.
The patches for transmitting and receiving in the antenna unit 101 can e.g. be circular or rectangular in shape. Rectangular shaped patches are not shown in any figure.
FIG. 6 illustrates a view of a second embodiment of a circularly polarised antenna unit 601 according to the present invention. The antenna unit 601 comprises a first and a second phased array antenna with cross formed slots as radiating antenna elements. The phased array antennas 700a, 700b respectively are illustrated in FIG. 7b-c and are interleaved with each other and embedded in a multi-layer structure within the antenna unit 601.
The first phased array antenna 700a comprises slots for receiving 603 arranged in a first lattice 604.
The second phased array antenna 700b comprises slots for transmitting 602 arranged in a second lattice 605.
FIG. 6 shows an example of a pattern for the first and second lattice. The first and second lattices are illustrated with dashed-dotted lines 604,605 respectively in FIG. 6.
The cross formed slots for transmitting 602 in the second lattice 605 are dashed to illustrate that they are in a different layer than the slots for receiving 603 in the first lattice 604.
Each slot 603 for receiving in the first lattice 604 is arranged in a centre of a rectangular ground plane 606 of a limited area. This implies that there are as many slots 603 as rectangular ground planes 606. The rectangular ground planes 606 is electromagnetically sufficiently large but small enough to fit into the first lattice 604.
The slots for transmitting 602 are smaller and of a larger number than the slots for receiving 603 due to a higher frequency for the transmitted radio signals than the received radio signals.
The slots for receiving 603 can as an alternative be used for transmitting and the slots for transmitting 602 can be used for receiving if the received radio signals are of a higher frequency than the transmitted radio signals.
The ground planes 606 can have other shapes than rectangular e.g. a circular shape.
The slots for transmitting and receiving in the antenna unit 601 can have other shapes than a cross e.g. linear shaped slots arranged in orthogonal pairs. According to FIG. 7a which is a cross-section along line B--B, shown in FIG. 6, the first lattice 604 with the slots for receiving 603 are arranged in a first layer 702 and the second lattice 605 with the slots for transmitting 602 are arranged in a conductive second layer 703.
Between the first and second layer 702,703 respectively is the first dielectrical volume 201 arranged. The ground plane 203 comprising an electrically conductive material is arranged in a third layer 704. Between the second and third layer 703,704 respectively is the second dielectrical volume 202 arranged.
Each of the slots for receiving 603 in the first layer 702 has a second centre axis C2b which is extending perpendicular through said first, second and third layer 702, 703, 704 respectively. Each of the slots for transmitting 602 in the second layer 703 has a first centre axis C1b which is extending perpendicular through said first, second and third layer 702, 703, 704 respectively.
FIG. 7b shows the first phased array antenna 700a interleaved with the second phased array antenna 700b, where the conductive second layer 703 with the slots for transmitting 602 in the second phased array antenna 700b functions as a solid ground plane not perturbed by the slots 602. The remaining part of the second phased array antenna 700b is dotted.
FIG. 7c shows the second phased array antenna 700b interleaved with the first phased array antenna 700a, where the slots for receiving 603 of the first phased array antenna 700a is dotted.
FIG. 8 shows a part of the example of the first and second lattice 604,605 respectively forming a pattern, where four slots for transmitting 802a-d in the second layer 703 are arranged in a square 801. Each of their centre axis's C1b are situated in the corners of the square 801. A first slot for transmitting 802a is diagonal arranged to a fourth slot for transmitting 802d in the second lattice 605 of the antenna unit 601. The square is illustrated in the figure by a dotted line.
A distance d3 from one centre axis C1b to another centre axis C1b along a side of the square 801 is determined by the transmitting frequency in a known way to avoid the generation of grating lobes.
A first slot for receiving 803a in the first lattice 604 is arranged in the first layer 702 in such a way that the centre axis C2b of the first slot for transmitting 803a coincide with the centre axis C1b of slot 802a in the second layer 703, see FIG. 7a.
A second slot for receiving 803b, see FIG. 8, is arranged in the first layer 702 in such a way that the centre axis C2b of the second slot 803b coincide with the centre axis C1b of the fourth slot for transmitting 802d in the second layer 703.
The slots for transmitting 802a-d and receiving 803a-b define various transmit and receive nodes according to the following:
The first slot for transmitting 802a in the second lattice 605 defines a first transmit node;
The fourth slot for transmitting 802d in the second lattice 605 defines a fourth transmit node;
The first slot for receiving 803a in the first lattice 604 defines a first receive node;
The second slot for receiving 803b in the first lattice 604 defines a second receive node.
The first receive node in the first lattice 604 and the first transmit node in the second lattice 605 defines a first common node 804a for both of the phased array antennas 700a,700b respectively in the antenna unit 601.
The second receive node in the first lattice 604 and the fourth transmit node in the second lattice 605 defines a second common node 804b for both of the phased array antennas 700a,700b respectively in the antenna unit 601.
The slots for receiving 803a and 803b in the first layer 702 functions as driver slots for the first phased array antenna 700a. The slots for transmitting 802a-802d in the second layer 703 has a first function as driver slots for the second phased array antenna 700b and a second function as a ground plane for the receiving frequency, which is lower than the transmitting frequency, of the first phased array antenna 700a. The conductive second layer 205 in which the slots for transmitting 802a-802d are arranged functions as a single ground plane for the first phased array antenna 700a in the antenna unit 601.
The ground plane 203 in the third layer functions as a single ground plane 203 for the second phased array antenna 700b in the antenna unit 601.
The pattern of the first and second lattice 604,605 respectively according to FIG. 8 is repeated in the whole antenna unit 601 as seen in FIG. 6. This implies that each one of the slot for receiving 603 in the first lattice 604 forms a common node 607 with every other slot for transmitting 602 in the second lattice 605 as seen in FIG. 7a.
The slots for receiving 603 in the first layer 702 and the slots for transmitting 602 in the second layer 703 are arranged in two interleaved lattices which constitute a periodically multilayer structure in the antenna unit 601.
The interleaved lattices 604,605 respectively in the antenna unit 601 makes it possible to configure the second lattice 605 in a rectangular, triangular, pentagonal or hexagonal pattern to adopt to the differences between the wave length of the first and second phased array antenna 700a,700b respectively.
The size of and the distances between the slots in the antenna unit 601, according to FIG. 8, is determined by the transmit and receive frequencies in a known way to avoid the generation of grating lobes.
Each one of the antenna units 101 and 601 of the present invention comprises beam forming networks to distribute RF (Radio Frequency) power to/from the patches and slots in the antenna units 101 and 601 in a known way.
FIG. 9 illustrates an example of two analog phased delay beam forming networks 901a, 901b respectively connected to the radiating elements 903 and 904 of the antenna units 101,601 respectively. A φ-symbol in the figure illustrates that the phase is changed.
The beam forming could also be performed by digital signal processing at IF or base band frequency level.
The antenna units 101 and 601 can as an example be used for frequencies above 10 GHz. As example of transmission and frequency bands and the ratio between those bands the 20 and 30 GHz bands can be mentioned for receiving and transmitting respectively, which gives a ratio of 1.5.
Reinefjord, Jan Staffan, Derneryd, Sven Anders Gosta, Schefte, deceased, Henry
| Patent | Priority | Assignee | Title |
| 10009063, | Sep 16 2015 | AT&T Intellectual Property I, L P | Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal |
| 10009065, | Dec 05 2012 | AT&T Intellectual Property I, LP | Backhaul link for distributed antenna system |
| 10009067, | Dec 04 2014 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Method and apparatus for configuring a communication interface |
| 10009901, | Sep 16 2015 | AT&T Intellectual Property I, L.P. | Method, apparatus, and computer-readable storage medium for managing utilization of wireless resources between base stations |
| 10020587, | Jul 31 2015 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Radial antenna and methods for use therewith |
| 10020844, | Dec 06 2016 | AT&T Intellectual Property I, LP | Method and apparatus for broadcast communication via guided waves |
| 10027397, | Dec 07 2016 | AT&T Intellectual Property I, L P | Distributed antenna system and methods for use therewith |
| 10027398, | Jun 11 2015 | AT&T Intellectual Property I, LP | Repeater and methods for use therewith |
| 10033107, | Jul 14 2015 | AT&T Intellectual Property I, LP | Method and apparatus for coupling an antenna to a device |
| 10033108, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference |
| 10044409, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
| 10050697, | Jun 03 2015 | AT&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
| 10051483, | Oct 16 2015 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Method and apparatus for directing wireless signals |
| 10051629, | Sep 16 2015 | AT&T Intellectual Property I, L P | Method and apparatus for use with a radio distributed antenna system having an in-band reference signal |
| 10051630, | May 31 2013 | AT&T Intellectual Property I, L.P. | Remote distributed antenna system |
| 10063280, | Sep 17 2014 | AT&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
| 10069185, | Jun 25 2015 | AT&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
| 10069535, | Dec 08 2016 | AT&T Intellectual Property I, L P | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
| 10074886, | Jul 23 2015 | AT&T Intellectual Property I, L.P. | Dielectric transmission medium comprising a plurality of rigid dielectric members coupled together in a ball and socket configuration |
| 10074890, | Oct 02 2015 | AT&T Intellectual Property I, L.P. | Communication device and antenna with integrated light assembly |
| 10079661, | Sep 16 2015 | AT&T Intellectual Property I, L P | Method and apparatus for use with a radio distributed antenna system having a clock reference |
| 10090594, | Nov 23 2016 | AT&T Intellectual Property I, L.P. | Antenna system having structural configurations for assembly |
| 10090601, | Jun 25 2015 | AT&T Intellectual Property I, L.P. | Waveguide system and methods for inducing a non-fundamental wave mode on a transmission medium |
| 10090606, | Jul 15 2015 | AT&T Intellectual Property I, L.P. | Antenna system with dielectric array and methods for use therewith |
| 10091787, | May 31 2013 | AT&T Intellectual Property I, L.P. | Remote distributed antenna system |
| 10096881, | Aug 26 2014 | AT&T Intellectual Property I, L.P. | Guided wave couplers for coupling electromagnetic waves to an outer surface of a transmission medium |
| 10103422, | Dec 08 2016 | AT&T Intellectual Property I, L P | Method and apparatus for mounting network devices |
| 10103801, | Jun 03 2015 | AT&T Intellectual Property I, LP | Host node device and methods for use therewith |
| 10135145, | Dec 06 2016 | AT&T Intellectual Property I, L P | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
| 10135146, | Oct 18 2016 | AT&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
| 10135147, | Oct 18 2016 | AT&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
| 10136434, | Sep 16 2015 | AT&T Intellectual Property I, L P | Method and apparatus for use with a radio distributed antenna system having an ultra-wideband control channel |
| 10139820, | Dec 07 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for deploying equipment of a communication system |
| 10142010, | Jun 11 2015 | AT&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
| 10142086, | Jun 11 2015 | AT&T Intellectual Property I, L P | Repeater and methods for use therewith |
| 10144036, | Jan 30 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for mitigating interference affecting a propagation of electromagnetic waves guided by a transmission medium |
| 10148016, | Jul 14 2015 | AT&T Intellectual Property I, L P | Apparatus and methods for communicating utilizing an antenna array |
| 10154493, | Jun 03 2015 | AT&T Intellectual Property I, LP | Network termination and methods for use therewith |
| 10168695, | Dec 07 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
| 10170840, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Apparatus and methods for sending or receiving electromagnetic signals |
| 10178445, | Nov 23 2016 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, L P | Methods, devices, and systems for load balancing between a plurality of waveguides |
| 10194437, | Dec 05 2012 | AT&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
| 10205655, | Jul 14 2015 | AT&T Intellectual Property I, L P | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
| 10224634, | Nov 03 2016 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, L P | Methods and apparatus for adjusting an operational characteristic of an antenna |
| 10224981, | Apr 24 2015 | AT&T Intellectual Property I, LP | Passive electrical coupling device and methods for use therewith |
| 10225025, | Nov 03 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
| 10225842, | Sep 16 2015 | AT&T Intellectual Property I, L.P. | Method, device and storage medium for communications using a modulated signal and a reference signal |
| 10243270, | Dec 07 2016 | AT&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
| 10243784, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
| 10264586, | Dec 09 2016 | AT&T Intellectual Property I, L P | Cloud-based packet controller and methods for use therewith |
| 10291311, | Sep 09 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for mitigating a fault in a distributed antenna system |
| 10291334, | Nov 03 2016 | AT&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
| 10298293, | Mar 13 2017 | AT&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
| 10305190, | Dec 01 2016 | AT&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
| 10312567, | Oct 26 2016 | AT&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
| 10320586, | Jul 14 2015 | AT&T Intellectual Property I, L P | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
| 10326494, | Dec 06 2016 | AT&T Intellectual Property I, L P | Apparatus for measurement de-embedding and methods for use therewith |
| 10326689, | Dec 08 2016 | AT&T Intellectual Property I, LP | Method and system for providing alternative communication paths |
| 10340573, | Oct 26 2016 | AT&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
| 10340600, | Oct 18 2016 | AT&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
| 10340601, | Nov 23 2016 | AT&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
| 10340603, | Nov 23 2016 | AT&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
| 10340983, | Dec 09 2016 | AT&T Intellectual Property I, L P | Method and apparatus for surveying remote sites via guided wave communications |
| 10341142, | Jul 14 2015 | AT&T Intellectual Property I, L P | Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor |
| 10348391, | Jun 03 2015 | AT&T Intellectual Property I, LP | Client node device with frequency conversion and methods for use therewith |
| 10349418, | Sep 16 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for managing utilization of wireless resources via use of a reference signal to reduce distortion |
| 10355367, | Oct 16 2015 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Antenna structure for exchanging wireless signals |
| 10359749, | Dec 07 2016 | AT&T Intellectual Property I, L P | Method and apparatus for utilities management via guided wave communication |
| 10361489, | Dec 01 2016 | AT&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
| 10374316, | Oct 21 2016 | AT&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
| 10382976, | Dec 06 2016 | AT&T Intellectual Property I, LP | Method and apparatus for managing wireless communications based on communication paths and network device positions |
| 10389029, | Dec 07 2016 | AT&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
| 10389037, | Dec 08 2016 | AT&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
| 10396887, | Jun 03 2015 | AT&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
| 10411356, | Dec 08 2016 | AT&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
| 10439283, | Dec 12 2014 | HUAWEI TECHNOLOGIES CO , LTD | High coverage antenna array and method using grating lobe layers |
| 10439675, | Dec 06 2016 | AT&T Intellectual Property I, L P | Method and apparatus for repeating guided wave communication signals |
| 10446936, | Dec 07 2016 | AT&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
| 10498044, | Nov 03 2016 | AT&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
| 10530505, | Dec 08 2016 | AT&T Intellectual Property I, L P | Apparatus and methods for launching electromagnetic waves along a transmission medium |
| 10535928, | Nov 23 2016 | AT&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
| 10547348, | Dec 07 2016 | AT&T Intellectual Property I, L P | Method and apparatus for switching transmission mediums in a communication system |
| 10601494, | Dec 08 2016 | AT&T Intellectual Property I, L P | Dual-band communication device and method for use therewith |
| 10637149, | Dec 06 2016 | AT&T Intellectual Property I, L P | Injection molded dielectric antenna and methods for use therewith |
| 10650940, | May 15 2015 | AT&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
| 10665942, | Oct 16 2015 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Method and apparatus for adjusting wireless communications |
| 10679767, | May 15 2015 | AT&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
| 10694379, | Dec 06 2016 | AT&T Intellectual Property I, LP | Waveguide system with device-based authentication and methods for use therewith |
| 10727599, | Dec 06 2016 | AT&T Intellectual Property I, L P | Launcher with slot antenna and methods for use therewith |
| 10743196, | Oct 16 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for directing wireless signals |
| 10755542, | Dec 06 2016 | AT&T Intellectual Property I, L P | Method and apparatus for surveillance via guided wave communication |
| 10777873, | Dec 08 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
| 10784670, | Jul 23 2015 | AT&T Intellectual Property I, L.P. | Antenna support for aligning an antenna |
| 10797781, | Jun 03 2015 | AT&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
| 10811767, | Oct 21 2016 | AT&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
| 10812174, | Jun 03 2015 | AT&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
| 10819035, | Dec 06 2016 | AT&T Intellectual Property I, L P | Launcher with helical antenna and methods for use therewith |
| 10838038, | Jun 20 2018 | GM Global Technology Operations LLC | Multi-mode radar antenna |
| 10916969, | Dec 08 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
| 10938108, | Dec 08 2016 | AT&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
| 11032819, | Sep 15 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a control channel reference signal |
| 11088469, | Apr 03 2020 | Auden Techno Corp. | Common antenna assembly and common antenna structure |
| 11211702, | Dec 11 2019 | Amazon Technologies, Inc | Overlapping multiband phased array antennas |
| 11223100, | Mar 25 2019 | Samsung Electro-Mechanics Co., Ltd. | Chip antenna |
| 11374327, | Mar 30 2020 | The Boeing Company | Microstrip to microstrip vialess transition |
| 11652272, | Mar 25 2019 | Samsung Electro-Mechanics Co., Ltd. | Chip antenna |
| 11843187, | Apr 26 2021 | Amazon Technologies, Inc. | Antenna module grounding for phased array antennas |
| 6593891, | Oct 19 2001 | Hitachi Cable, Ltd. | Antenna apparatus having cross-shaped slot |
| 6664938, | Mar 01 2002 | EMS Technologies Canada, LTD | Pentagonal helical antenna array |
| 6753817, | Dec 27 2001 | Nihon Dempa Kogyo Co., Ltd. | Multi-element planar array antenna |
| 6795020, | Jan 24 2002 | Ball Aerospace and Technologies Corp. | Dual band coplanar microstrip interlaced array |
| 7026995, | Jan 24 2002 | Ball Aerospace & Technologies Corp. | Dielectric materials with modified dielectric constants |
| 7075485, | Nov 24 2003 | Hong Kong Applied Science and Technology Research Institute Co., Ltd. | Low cost multi-beam, multi-band and multi-diversity antenna systems and methods for wireless communications |
| 7307587, | Jun 10 2004 | Electronics and Telecommunications Research Institute | High-gain radiating element structure using multilayered metallic disk array |
| 7525504, | Nov 24 2003 | Hong Kong Applied Science and Technology Research Institute Co., Ltd. | Low cost multi-beam, multi-band and multi-diversity antenna systems and methods for wireless communications |
| 7808427, | May 28 2009 | Raytheon Company | Radar system having dual band polarization versatile active electronically scanned lens array |
| 8009112, | Feb 18 2005 | Viasat, Inc | Feed assembly for dual-band transmit-receive antenna |
| 8228233, | Apr 26 2010 | Dell Products, LP | Directional antenna and methods thereof |
| 9312919, | Oct 21 2014 | AT&T Intellectual Property I, LP | Transmission device with impairment compensation and methods for use therewith |
| 9461706, | Jul 31 2015 | AT&T Intellectual Property I, LP | Method and apparatus for exchanging communication signals |
| 9467870, | Nov 06 2013 | AT&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
| 9479266, | Dec 10 2013 | AT&T Intellectual Property I, L.P. | Quasi-optical coupler |
| 9490869, | May 14 2015 | AT&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
| 9503189, | Oct 10 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
| 9509415, | Jun 25 2015 | AT&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
| 9520945, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
| 9525210, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
| 9525524, | May 31 2013 | AT&T Intellectual Property I, L.P. | Remote distributed antenna system |
| 9531427, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
| 9544006, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
| 9564947, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device with diversity and methods for use therewith |
| 9571209, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
| 9577306, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
| 9577307, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
| 9596001, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
| 9608692, | Jun 11 2015 | AT&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
| 9608740, | Jul 15 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
| 9615269, | Oct 02 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
| 9627768, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
| 9628116, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Apparatus and methods for transmitting wireless signals |
| 9628854, | Sep 29 2014 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Method and apparatus for distributing content in a communication network |
| 9640850, | Jun 25 2015 | AT&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
| 9653770, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided wave coupler, coupling module and methods for use therewith |
| 9654173, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Apparatus for powering a communication device and methods thereof |
| 9661505, | Nov 06 2013 | AT&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
| 9667317, | Jun 15 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
| 9674711, | Nov 06 2013 | AT&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
| 9680670, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Transmission device with channel equalization and control and methods for use therewith |
| 9685992, | Oct 03 2014 | AT&T Intellectual Property I, L.P. | Circuit panel network and methods thereof |
| 9692101, | Aug 26 2014 | AT&T Intellectual Property I, LP | Guided wave couplers for coupling electromagnetic waves between a waveguide surface and a surface of a wire |
| 9699785, | Dec 05 2012 | AT&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
| 9705561, | Apr 24 2015 | AT&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
| 9705571, | Sep 16 2015 | AT&T Intellectual Property I, L P | Method and apparatus for use with a radio distributed antenna system |
| 9705610, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
| 9712350, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Transmission device with channel equalization and control and methods for use therewith |
| 9722318, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
| 9729197, | Oct 01 2015 | AT&T Intellectual Property I, LP | Method and apparatus for communicating network management traffic over a network |
| 9735833, | Jul 31 2015 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Method and apparatus for communications management in a neighborhood network |
| 9742462, | Dec 04 2014 | AT&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
| 9742521, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
| 9748626, | May 14 2015 | AT&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
| 9749013, | Mar 17 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium |
| 9749053, | Jul 23 2015 | AT&T Intellectual Property I, L.P. | Node device, repeater and methods for use therewith |
| 9749083, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
| 9755697, | Sep 15 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
| 9762289, | Oct 14 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for transmitting or receiving signals in a transportation system |
| 9768833, | Sep 15 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
| 9769020, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
| 9769128, | Sep 28 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for encryption of communications over a network |
| 9780834, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
| 9787412, | Jun 25 2015 | AT&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
| 9788326, | Dec 05 2012 | AT&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
| 9793951, | Jul 15 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
| 9793954, | Apr 28 2015 | AT&T Intellectual Property I, L.P. | Magnetic coupling device and methods for use therewith |
| 9793955, | Apr 24 2015 | AT&T Intellectual Property I, LP | Passive electrical coupling device and methods for use therewith |
| 9794003, | Dec 10 2013 | AT&T Intellectual Property I, L.P. | Quasi-optical coupler |
| 9800327, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Apparatus for controlling operations of a communication device and methods thereof |
| 9806818, | Jul 23 2015 | AT&T Intellectual Property I, LP | Node device, repeater and methods for use therewith |
| 9820146, | Jun 12 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
| 9831912, | Apr 24 2015 | AT&T Intellectual Property I, LP | Directional coupling device and methods for use therewith |
| 9836957, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for communicating with premises equipment |
| 9838078, | Jul 31 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
| 9838896, | Dec 09 2016 | AT&T Intellectual Property I, L P | Method and apparatus for assessing network coverage |
| 9843098, | May 01 2014 | Raytheon Company | Interleaved electronically scanned arrays |
| 9847566, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
| 9847850, | Oct 14 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
| 9853342, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
| 9860075, | Aug 26 2016 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, L P | Method and communication node for broadband distribution |
| 9865911, | Jun 25 2015 | AT&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
| 9866276, | Oct 10 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
| 9866309, | Jun 03 2015 | AT&T Intellectual Property I, LP | Host node device and methods for use therewith |
| 9871282, | May 14 2015 | AT&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
| 9871283, | Jul 23 2015 | AT&T Intellectual Property I, LP | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
| 9871558, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
| 9876264, | Oct 02 2015 | AT&T Intellectual Property I, LP | Communication system, guided wave switch and methods for use therewith |
| 9876570, | Feb 20 2015 | AT&T Intellectual Property I, LP | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
| 9876571, | Feb 20 2015 | AT&T Intellectual Property I, LP | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
| 9876584, | Dec 10 2013 | AT&T Intellectual Property I, L.P. | Quasi-optical coupler |
| 9876587, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
| 9876605, | Oct 21 2016 | AT&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
| 9882257, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
| 9882277, | Oct 02 2015 | AT&T Intellectual Property I, LP | Communication device and antenna assembly with actuated gimbal mount |
| 9882657, | Jun 25 2015 | AT&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
| 9887447, | May 14 2015 | AT&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
| 9893795, | Dec 07 2016 | AT&T Intellectual Property I, LP | Method and repeater for broadband distribution |
| 9904535, | Sep 14 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
| 9906269, | Sep 17 2014 | AT&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
| 9911020, | Dec 08 2016 | AT&T Intellectual Property I, L P | Method and apparatus for tracking via a radio frequency identification device |
| 9912027, | Jul 23 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
| 9912033, | Oct 21 2014 | AT&T Intellectual Property I, LP | Guided wave coupler, coupling module and methods for use therewith |
| 9912381, | Jun 03 2015 | AT&T Intellectual Property I, LP | Network termination and methods for use therewith |
| 9912382, | Jun 03 2015 | AT&T Intellectual Property I, LP | Network termination and methods for use therewith |
| 9912419, | Aug 24 2016 | AT&T Intellectual Property I, L.P. | Method and apparatus for managing a fault in a distributed antenna system |
| 9913139, | Jun 09 2015 | AT&T Intellectual Property I, L.P. | Signal fingerprinting for authentication of communicating devices |
| 9917341, | May 27 2015 | AT&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
| 9917374, | Jun 26 2015 | HENSOLDT SENSORS GMBH | Dual-band phased array antenna with built-in grating lobe mitigation |
| 9927517, | Dec 06 2016 | AT&T Intellectual Property I, L P | Apparatus and methods for sensing rainfall |
| 9929755, | Jul 14 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
| 9930668, | May 31 2013 | AT&T Intellectual Property I, L.P. | Remote distributed antenna system |
| 9935703, | Jun 03 2015 | AT&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
| 9947982, | Jul 14 2015 | AT&T Intellectual Property I, LP | Dielectric transmission medium connector and methods for use therewith |
| 9948333, | Jul 23 2015 | AT&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
| 9948354, | Apr 28 2015 | AT&T Intellectual Property I, L.P. | Magnetic coupling device with reflective plate and methods for use therewith |
| 9948355, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
| 9954286, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
| 9954287, | Nov 20 2014 | AT&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
| 9960808, | Oct 21 2014 | AT&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
| 9967002, | Jun 03 2015 | AT&T INTELLECTUAL I, LP | Network termination and methods for use therewith |
| 9967173, | Jul 31 2015 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, LP | Method and apparatus for authentication and identity management of communicating devices |
| 9973299, | Oct 14 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
| 9973416, | Oct 02 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
| 9973940, | Feb 27 2017 | AT&T Intellectual Property I, L.P.; AT&T Intellectual Property I, L P | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
| 9991580, | Oct 21 2016 | AT&T Intellectual Property I, L.P. | Launcher and coupling system for guided wave mode cancellation |
| 9997819, | Jun 09 2015 | AT&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
| 9998870, | Dec 08 2016 | AT&T Intellectual Property I, L P | Method and apparatus for proximity sensing |
| 9998932, | Oct 02 2014 | AT&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
| 9999038, | May 31 2013 | AT&T Intellectual Property I, L P | Remote distributed antenna system |
| Patent | Priority | Assignee | Title |
| 4783661, | Nov 29 1986 | Nortel Networks Limited | Dual-band circularly polarised antenna with hemispherical coverage |
| 4827271, | Nov 24 1986 | McDonnell Douglas Corporation | Dual frequency microstrip patch antenna with improved feed and increased bandwidth |
| 4903033, | Apr 01 1988 | SPACE SYSTEMS LORAL, INC , A CORP OF DELAWARE | Planar dual polarization antenna |
| 5003318, | Nov 24 1986 | McDonnell Douglas Corporation | Dual frequency microstrip patch antenna with capacitively coupled feed pins |
| 5043738, | Mar 15 1990 | Hughes Electronics Corporation | Plural frequency patch antenna assembly |
| 5153600, | Jul 01 1991 | Ball Aerospace & Technologies Corp | Multiple-frequency stacked microstrip antenna |
| 5231407, | Apr 18 1989 | NOVATEL WIRELESS SOLUTIONS, INC | Duplexing antenna for portable radio transceiver |
| 5287116, | May 30 1991 | Kabushiki Kaisha Toshiba | Array antenna generating circularly polarized waves with a plurality of microstrip antennas |
| 5434580, | Dec 08 1988 | Alcatel Espace | Multifrequency array with composite radiators |
| 5561434, | Jun 11 1993 | NEC Corporation | Dual band phased array antenna apparatus having compact hardware |
| 5650788, | Nov 08 1991 | Wengen Wireless LLC | Terrestrial antennas for satellite communication system |
| 5912645, | Mar 19 1996 | Her Majesty the Queen in right of Canada, as represented by the Minister | Array feed for axially symmetric and offset reflectors |
| 5923296, | Sep 06 1996 | Texas Instruments Incorporated | Dual polarized microstrip patch antenna array for PCS base stations |
| AU2711795, | |||
| AU7580694, | |||
| EP649227A1, | |||
| EP696112A2, | |||
| EP752735A1, | |||
| EP753897A2, | |||
| FR2673496, | |||
| GB2293277A, | |||
| JP1321738, | |||
| JP248830, | |||
| JP4252523, | |||
| JP440003, | |||
| JP56168437, | |||
| JP6224622, | |||
| JP7060777A, | |||
| JP7321548A, | |||
| JP8213835A, | |||
| WO9504386, | |||
| WO9610276, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
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